Expansion unit for increasing the functions of an electronic computer



FIG. 1 is a top, front and right side perspective view of an expansion unit for increasing the functions of an electronic computer showing my new design;

FIG. 2 is a front elevational view thereof with the cover for the circular control elements along the front shown closed;

FIG. 3 is a top plan view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is a rear elevational view thereof. 

The ornamental design for an expansion unit for increasing the functions of an electronic computer, as shown and described. 